# Re: \[PATCH 4/7\] xfs: Implement fallocate query support mode

- From: OGAWA Hirofumi \<hirofumi@mail.parknet.co.jp\>
- Date: 2017-09-19 03:28:08 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2017/09/125991
- Thread: https://ratatoskr.run/linux-fsdevel/2017/09/125991/t.md

```text
Christoph Hellwig [ref] writes:

I myself

Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

to [5/7] fat part though,

> That being said, I really detest adding weird query modes to random
> syscalls.  We should expose capabilities through the interface that
> was designed for such things: (f)pathconf, as there are a lot more
> important parameters we currently fail to expose to userspace to
> start with.

This is true. For example, max link count. And it might be able to use
for fs's bug/issue detection too (in past, userland has to add
workaround for all cases, because noway to detect the buggy or not).

Thanks.
-- 
OGAWA Hirofumi [ref]
```